ROW_FILTERS
Databricks Runtime 12.2 LTS and above Unity Catalog only.
Preview
This feature is in Public Preview.
INFORMATION_SCHEMA.ROW_FILTERS contains the row filter metadata for relations in the catalog, or all catalogs if owned by the SYSTEM catalog.
Information is displayed only for relation the user has permission to interact with.
This relation is an extension to the SQL Standard Information Schema.
Definition
The ROW_FILTERS relation contains the following.
| Name | Data type | Nullable | Description |
|---|---|---|---|
CATALOG_NAME | STRING | No | Catalog that contains the table. |
SCHEMA_NAME | STRING | No | Schema that contains the table. |
TABLE_NAME | STRING | No | Name of the relation to which the row filter applies. |
FILTER_CATALOG | STRING | No | Catalog that contains the filter function. |
FILTER_SCHEMA | STRING | No | Schema that contains the filter function. |
FILTER_NAME | STRING | No | The specific name of the function implementing the filter. |
FILTER_COL_USAGE | STRING | No | A comma separated list of columns passed to the filter function. Empty if none. |
Constraints
The following constraint applies to the ROW_FILTERS relation:
| Class | Name | Column List | Description |
|---|---|---|---|
| Primary key | ROW_FILTERS_PK | CATALOG_NAME, SCHEMA_NAME, TABLE_NAME | Unique identifier for a row filter. |
| Foreign key | ROW_FILTERS_TABLES_FK | CATALOG_NAME, SCHEMA_NAME, TABLE_NAME | References TABLES |
| Foreign key | ROW_FILTERS_ROUTINES_FK | FILTER_CATALOG, FILTER_SCHEMA, FILTER_NAME | References ROUTINES |
Example
SQL
-- Return the names of all functions used as row filters in the current catalog.
> SELECT filter_catalog, filter_schema, filter_name, count(1)
FROM information_schema.row_filters
GROUP BY ALL
ORDER BY ALL;